{
  "manageEntity": {
    "action": "Save",
    "entityId": "1753607898",
    "entityType": "Track",
    "nonce": "0x0c1b9bd15bb6adbc051ae5d8106080152d82e2268c7114e776bc3ba9b08a06d3",
    "signature": "0xa3b159266b8442559169cc02427d7b06d669a429b21c120a70679bdde84673e9083b5e4ca0b5e5ba961c97ba84efc649abc369e01b90dc6de28cd355f1df0e5a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}