{
  "manageEntity": {
    "action": "Save",
    "entityId": "194191",
    "entityType": "Track",
    "nonce": "0x38cc414dd25fe52ac58529bfe4df39ea42b288eea4a1e21e8fe729e87b600168",
    "signature": "0xd5fbffc1dfd79c54cbda1157660e90b7a1d44637a91da35843c815430eedd1ad3cac84b9d218b5bdf0ba3659a0550c309e249751d1c29d05ce2e4a331fcf7a0b1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}