{
  "manageEntity": {
    "action": "Save",
    "entityId": "1087018412",
    "entityType": "Track",
    "nonce": "0x5352e79a01b8ad78646da27ea39c2f8149afd3f994d752d0f4979f8e805a6d75",
    "signature": "0xdd3e8a0d3a64f9575d196b626edc620ffed7e5f937827677633321a79229a1d705baecae9b91b16c5ed82ee39bc50c7b9be8fa71ac9f24ab21ed0977621697601b",
    "signer": "0x92d3aEA782A42D4B044a13a4727af9Aca3a0211F",
    "userId": "12615893"
  }
}