{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930584662",
    "entityType": "Track",
    "nonce": "0x18e1ff155a029cc04da6e4dcb4d826bc38f194efc7f308d0229f6fd723871bd7",
    "signature": "0xcad98c77a99d78ddc29aea8a8b8d70778835e96d2c33676a42355c16273175127096b0ae0bcc09538526636dd061278f8cfc6ce5df8569083e1539ff091637d81c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}