{
  "manageEntity": {
    "action": "Save",
    "entityId": "224225256",
    "entityType": "Track",
    "nonce": "0x678fe2c068fc6bf41f989aeb12c33d62e7ede643fbc20971bcfcae4850924adb",
    "signature": "0x5e600de4c33058fc29038ee362b89518c2dacce55d7370fc84144957b577c38b7638df42fc44048db367e80615dc3f67176171ddf53e7027fca7a00c043a8b101b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}