{
  "manageEntity": {
    "action": "Save",
    "entityId": "1579006166",
    "entityType": "Track",
    "nonce": "0x60d7d402a7f73392e29015c73d37be0c2fd4103ffee7ed6bac138e5cbae0ac30",
    "signature": "0x5e1c25031eacbf19b0bebd5b8d2433d13e296d946dcc0bcb276957b9e08797502bb41bdd0a87f5c8ca1699ea6d6d3c9c24fda02247a03a9fd74b1c670714021c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}