{
  "manageEntity": {
    "action": "Save",
    "entityId": "1549057913",
    "entityType": "Track",
    "nonce": "0x06e5523ceee75ef896687289721fa8a68bb7499ef14f19a69a7791c96910f73e",
    "signature": "0x24185caaa48c83653cc9f403d5d93304054ab04b7a39ca2cc9c779a950787dcc15e68f91e66b3b3aa67b1f759ba46e1e47a28dd226fd5ba816875467749e426d1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}