{
  "manageEntity": {
    "action": "Save",
    "entityId": "1997337530",
    "entityType": "Track",
    "nonce": "0x1e0ae1558af2a8f961f0e900a1dab1373109f83612f087c69c860731151f608d",
    "signature": "0x7a447de48c8167614bf1427962efe8a912ae0734fbb73dd1b7b3269c54aa67fb123795a328e1eb747169380170f3c2b964c528ec0aab4aabfa653ac8d5c931a11c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}