{
  "manageEntity": {
    "action": "Save",
    "entityId": "209291",
    "entityType": "Track",
    "nonce": "0x90f1e3beef175c2b020ceaa67a3edd98e4a8a34e6b251d9df8288a4f43b4f49f",
    "signature": "0x35ddcacc597c93af68c8fc82d5a6285fcb18fd533872a34dc54955de042e68461be51a4e96589e0dec6f079f4a1f7a5abd471122a163d8a57c0906dcbd9b129b1c",
    "signer": "0x5cd3eA7DcAA86960596227F4c8624063F3B8893D",
    "userId": "215993"
  }
}