{
  "manageEntity": {
    "action": "Save",
    "entityId": "1078453",
    "entityType": "Track",
    "nonce": "0xda673c9c3824815550272ac61df0de91578a6db451c142f82ac425fe9fd4b88f",
    "signature": "0x43e923d5126dcadb7e7bbaf81d56002554122490de66ccc0c8f7e0ea5cb465f97f6dfd8cf566c41079fb1571863cbec8e5af5d55d4a6d81d302cd9d04ddb82121b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}