{
  "manageEntity": {
    "action": "Save",
    "entityId": "2008587136",
    "entityType": "Track",
    "nonce": "0x1a24f9d50ec2ea9f30725fd6d3d48503efc204a35f866be320d8983c98d5951e",
    "signature": "0x7fcf456465a2eed0c8e09635886d744bd24c4eea30280fa852244e52b41c17705a73e6615ee826151bb61d3d6030bc8a0a842d86278cd347bf37b1342ad556ac1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}