{
  "manageEntity": {
    "action": "Save",
    "entityId": "53957174",
    "entityType": "Track",
    "nonce": "0xf27815f9fd6053ebc77de13a1aecc6ee779e0903476f22f0522c058d32fbe252",
    "signature": "0x4e71ab3a4f1a1210eab9f2c665b87f3f9b5a3808815507d61cf61e00f574c8a93cf2a98e0e1705dd70638e9ce69136f9e972c756a5d43e28f2e90625f8d9f9011b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}