{
  "manageEntity": {
    "action": "Save",
    "entityId": "950086068",
    "entityType": "Track",
    "nonce": "0x56e25d77aba73f2d7d571504c94aab24e0cb20ca9f7b323d346e3f8cf91463c5",
    "signature": "0x994fbda6237c75f7cc0d2b097cbd6274a8f63dd33330e79c8ee5f655b2c1932020d866365bd0f22f041a56be4b83f2e3031e6c75b06cfedefc5216e007a4a3e21c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}