{
  "manageEntity": {
    "action": "Save",
    "entityId": "548227676",
    "entityType": "Track",
    "nonce": "0x049d69abc73139ad7bd22456c6a76b75fdd09fa76487a3c87cdebe6999666bf2",
    "signature": "0xdc5c537c9148ed5ee484ed8188b24a51e5d00d6fefac7454f8c3f0588fb2f3b118dce9cf4f12323dd98bc6d3700ac815d3e192e442499892445654989703579d1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}