{
  "manageEntity": {
    "action": "Save",
    "entityId": "1046935935",
    "entityType": "Track",
    "nonce": "0xc709afebc1c39accd1ad62a212cb21fe1a0a3833f244ee6c3e1b10a402665f4e",
    "signature": "0xa87c6faf9a630ea7a9eb2bd937cf836e899bf7f10b8bc170fac3a14b937f88e459a178d342eebd9d58019b4f0401c5c1b0d338fb5cf2c28c9c03d40bff3b90e21c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}