{
  "manageEntity": {
    "action": "Save",
    "entityId": "1890789262",
    "entityType": "Track",
    "nonce": "0x6f1f8f1eaef4b80b2b6b2f6ecc08072ac16d00d23d43544e83a8ce79d7a45cd4",
    "signature": "0x98daececa31ca1ea0af31e8e66349058eb427c508e3b59c418dcb6e69bcc930b526109069d5707608541d42220831cc4798f858b157f42fce5f73eae8f3756ec1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}