{
  "manageEntity": {
    "action": "Save",
    "entityId": "187144327",
    "entityType": "Track",
    "nonce": "0xa6f06dac6bf88d67ed30c74de9146164bf7e291f549c1e2268f987bd3839f7b7",
    "signature": "0x05abf8682f859458c5b967cb309baffd5ae2cb69027a1f48b7f978afa3bd9ca03929b4df29e730a29e01bd2dc66faeaef712d946ce90ca27126dce601a79b3201b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}