{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514990083",
    "entityType": "Track",
    "nonce": "0xa01a710e8f480c7f21a566506e511c516abad418639569b722be5da314a03533",
    "signature": "0x5462298a8bd58be6c793d864552b8e59eb1f9ee5251ce306cb6fe38ea0846c4764d09bb3ed94f05fc52515ed8a205e6796679527be31b34f639850031dd85edd1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}