{
  "manageEntity": {
    "action": "Save",
    "entityId": "279843",
    "entityType": "Track",
    "nonce": "0xd470fe2c56d16af15c2348ce6ec6e4306df691b741e7899cf5e4eb5c1083bd9a",
    "signature": "0x4fcd6778db781865d66ab9d99047dad73e6128006c9a26d1dc490c4ccda07e6531e4a8233d720933d50427b37d6f97fbf4eec533ca97facd7a08d9370b09e4851b",
    "signer": "0xE22639FD840080b20889373FEa6060B4757eB9c1",
    "userId": "274627911"
  }
}