{
  "manageEntity": {
    "action": "Save",
    "entityId": "235889",
    "entityType": "Track",
    "nonce": "0x0c718d162ff1eb21b6a1fc79b9fe15aa49807e60481b48829d7b864d4b9de2b4",
    "signature": "0x8586b118d55bc6c06f74868326afd4ab7c766d0e3dfa6fdcfb628f2810759cf410141c9de0152c775258a87b390dc05a5142a17b72973a9e43fc16f41a0799911c",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}