{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758339254",
    "entityType": "Track",
    "nonce": "0x7f60fd9f270da8011794db3fff8acb19d22d1a4d1cd396001da312592ca50a25",
    "signature": "0x39dbbf3571612a445dcba5d81a5ea4d2e989a92f6dcfee5637d610b23ebececa2071301373a04629cba67e5ecc7cd88a9d3ac3d89c2983fd801f93927382a4171b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}