{
  "manageEntity": {
    "action": "Save",
    "entityId": "1842856920",
    "entityType": "Track",
    "nonce": "0xd729ad171ae5f2f0d9e194dc7d14f02d58ace635f0075802bf6491d366b622bf",
    "signature": "0x56b14d17befea9c582f7fa54afca1b3a9d357474e41f5b536abfd20c1043060c41210fd5a502d1fe9c25113bf9df966ef287e8ce85984b8583e3aa8d6096138f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}