{
  "manageEntity": {
    "action": "Save",
    "entityId": "585498634",
    "entityType": "Track",
    "nonce": "1788587907069638581",
    "signature": "0x57ed4573d868e7de67307311bf9ed20ac9f38a94e9bc04c4d0d055b9d22b7e4e2b91a01e2e79aa1c0ea56c93fa1d23b4bc47d621ba757d65ee2fd247e46be3911c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}