{
  "manageEntity": {
    "action": "Save",
    "entityId": "212261402",
    "entityType": "Track",
    "nonce": "0xa1e3ac0a63ccf8f5bf7248d90b789c714c5cb58b3b0e68f36588686fdadad6e5",
    "signature": "0x752468d263f4089955fc9851362db1a8165120259a94b9d04c5bd281c3b4d941577204c07505fe57401041bdbca592ba45fe47710a46e6688d862d0af082ea3a1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}