{
  "manageEntity": {
    "action": "Save",
    "entityId": "1115882760",
    "entityType": "Track",
    "nonce": "0x07a2478cb3d0506f08d484fc7dfe6bad750832de88e76cfb7d3f44d350649813",
    "signature": "0x29770dfda3fd06207ef1957160d40f853f859d8bf883548c0dd0cedc745ee2454626427e069c2d250d49714411b6b6c153fa8daab79abe2d3caa2dded1f743331c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}