{
  "manageEntity": {
    "action": "Save",
    "entityId": "1788896588",
    "entityType": "Track",
    "nonce": "0x39f9cf19a9c8cd214233997793f60d4169954b456d283fce35f171d116d9f5a7",
    "signature": "0x2fe1c4270e486f1d0738e3f9c12324135605680efb65b38822c6eaeb43d119115662113488f00c9a0d0b62a844f47d71cae91fbd551c4b6526449d0e9669276e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}