{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089214496",
    "entityType": "Track",
    "nonce": "0x3846b4804e846e92a1c0aa481235050a7fbd82fc098da5ddf3b659fefc8d2f12",
    "signature": "0x09f6047d2cd26f255a55bf1527871df28d1e43c39f240f25b0f08b774c539d1566537375f57989b34fc22cb03a9922a01ddcb755bffb103e418123cff8d06e661b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}