{
  "manageEntity": {
    "action": "Save",
    "entityId": "2008711249",
    "entityType": "Track",
    "nonce": "0x320c0a05ae028a032464d3431b5cef7d85e8cc2997fac12059cb50f3be0bcc02",
    "signature": "0x1f8b77cdb361a407b613bf25a62ccdaf09f8a3a25836c64995c89df7f5eb31af5487cff15191da0a62c639c656bac1a204260a138b0309d612b65abe080694d11c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}