{
  "manageEntity": {
    "action": "Save",
    "entityId": "357234",
    "entityType": "Track",
    "nonce": "0x4484166b86679794791e3b64a5cf1b3aaf26416ce0de10d8b4975d201682d2b7",
    "signature": "0x2602fd1fdcb10bfe6263efe38c3665280222bdb63cef9db9213f69af1a396f8d5695cb2193e321faac5cec63c758b28189674f1a0f31ffa96c4b2bae952fd4fe1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}