{
  "manageEntity": {
    "action": "Save",
    "entityId": "590767",
    "entityType": "Track",
    "nonce": "0xbafc7d59227616129ba6f6e89bc5361b6c8e317c9ce0f9f5dc603f0086cfa179",
    "signature": "0xeb329cba6b88637d0dc9bdbb80472c1a98eb4c5b609d5cc6c18a3bdcf902b40360a912213252dc83fd4a9397d17569a317f967f439cbf465052c16ed1e2af6031b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}