{
  "manageEntity": {
    "action": "Save",
    "entityId": "47185871",
    "entityType": "Track",
    "nonce": "0xbdcc1e73690a6131968c25739bd2c0fa0b43568da393874f1fc9c76e0f8b12ad",
    "signature": "0x806aa43bfaf5a6edfc359a5bdd8a9abcd6e8f91d75959c84677a56a37850756139cee883478d5e48951baeeab7b180bbf6acb0b9b04b2e8a7cac995ea7af2f8b1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}