{
  "manageEntity": {
    "action": "Save",
    "entityId": "1685539043",
    "entityType": "Track",
    "nonce": "1787541590283251259",
    "signature": "0x045e86787b46af9f4f8c34902765dc689ff0595d5f5b8e05dba1627fbd1bed7949c78d7e47182b404a92984054f4c7b526548a2a9e0e81cee2c30eca2fa7bf2d1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}