{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780774284",
    "entityType": "Track",
    "nonce": "0x6cc1bfa7e2f0913befa7a8382e2a7e5c74d33a7df32c33111673b847f5e55eef",
    "signature": "0xe93ecf42c2486c090ca8af8739e54cc80d29017973f2793dbadc3469c65f9f170f157da13fa153c78f1acfaf724a4719a2870bea3448cfa167f7b73ceb305b261c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}