{
  "manageEntity": {
    "action": "Save",
    "entityId": "1598715206",
    "entityType": "Track",
    "nonce": "0x5398088057eadf5aeb701e427cf0f551695c0f0e2291da9ab1be334ea7119852",
    "signature": "0x8fa2e1a5954641eb2a01edcfaaa90f09eb9092d83f2c8ae1755da64b19c9eefa38b7984f37a209e67ec3bdc555faf3be401ce3394d2be01b7762eec27798971c1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}