{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595154754",
    "entityType": "Track",
    "nonce": "0x7869280e5380b88ded0794879975e13a159c024f41125d6889d1c2ce2b51ca71",
    "signature": "0xfc3a172f5f1dc27c8c78c0505db1e67a9cc93c553710d6d439308eed25668c0616a1402da0615dbeb3337d4a0aeb0ecce405a5c51ec5b64c98f3b211e6046a331c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}