{
  "manageEntity": {
    "action": "Save",
    "entityId": "564879551",
    "entityType": "Track",
    "nonce": "0x39d9ebd1180f87fd080622fa4da8cac24972473557a542519db9df89bc20cbdb",
    "signature": "0x56515f5285ba506adb3e92d58c7c561338bb246895deda31212ff49cb10642a87ef45374c85255fc3cb4d7af791e2ba1bcd30919247c412b109282d7e800696c1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}