{
  "manageEntity": {
    "action": "Save",
    "entityId": "167828",
    "entityType": "Track",
    "nonce": "0xa47535a8d301f5f8f369a013be09ecb0314dcc04417f6fc2618bfeb82f894bf4",
    "signature": "0x57b3a337968628196c93c602939847b370b1e546568525906122987289b94fa266f870131b9c7bb14d56255617641d7841c238cbb39a966983a07a25c23428451c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}