{
  "manageEntity": {
    "action": "Save",
    "entityId": "1989220843",
    "entityType": "Track",
    "nonce": "0xc32a733ddc87f39aef40a29a93d8115f97dc63481155f65c61d61de4531ab9c6",
    "signature": "0xae227eebf20358b46329c1900c18e1c7dde87b19f13cb5192638d6101cdfdf7365208aa7293415f089fe06589a69529b887c29749398803070dee475d210386e1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}