{
  "manageEntity": {
    "action": "Save",
    "entityId": "571704",
    "entityType": "Track",
    "nonce": "0x62e5c4d622768ac9887c6ecd8d6cf6ace6ed7a5b5b50e4e426ebac37ef202761",
    "signature": "0x1a442e5934f7f2f0cff6cf9ecc1d77ed09c4eb8738c13ee5163ca8eab13de0812c2d7f26e1de3e40255a7835a556134b9a0ee7333ff4ba896f18440ed85d77aa1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}