{
  "manageEntity": {
    "action": "Save",
    "entityId": "705035",
    "entityType": "Track",
    "nonce": "0x26439c6a20fa03831f60b72507f10e5ac752454f0f28d7d75135364d5674624c",
    "signature": "0xa5e352675d631ad1727f919645904c2eb7decac88462ed273eeadc54d683e9d10fe9cbd1b701e4fbd38d95fb7270f3c59840955406fad15cf4c8c032a7c9e6811b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}