{
  "manageEntity": {
    "action": "Save",
    "entityId": "2067070999",
    "entityType": "Track",
    "nonce": "0xde0e0a0b84f39cb3de96ae57475621c7ba99adc82c013eb1b4c0426430a0217b",
    "signature": "0x56b81c33ac7b08b297b03c3ba9323990926eb6e32908189f9dcc409d054db332010cbf83bf7e0e9ade4eeb42abad42853a0646d040fa9943bfabeaf441879ac01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}