{
  "manageEntity": {
    "action": "Save",
    "entityId": "319447",
    "entityType": "Track",
    "nonce": "0x08b9fcd95fc41ebc3ebb3e74e716eb3fffeaa4d8dbc8e386749f0bba2b11ebfe",
    "signature": "0xe2afb84af1b88e55f21afa13e81bc2a9d848d792b644e50a8f328f4e38ad55c01f771eacfd5186c2b6f7fbc22442f3af5fdc5803ae41d9ba1cf0f04df046125d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}