{
  "manageEntity": {
    "action": "Save",
    "entityId": "659783910",
    "entityType": "Track",
    "nonce": "1792444588321484979",
    "signature": "0x94c495946cdf0be0422a78f45e97116434f47cde511ba48817ac9a5c7319b06e1ebaddd6dfed6422784563db1059076095a2447f3625e7892d4c0a9ab5d1f16b1c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}