{
  "manageEntity": {
    "action": "Save",
    "entityId": "1332568815",
    "entityType": "Track",
    "nonce": "0xb0db1c12babd4b58f5d9523623f677c39ad3d0f446aa44e9d4390f4a33726333",
    "signature": "0x4a87e266c1c13bbc4ecd1da55cb2021c1e1f2f9831eadd7510ea659a8a1dc947544ef95a26d34a15d0fcbdc74ca5df9c3ce979030383bc9a4cd8a5b38f5622101b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}