{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121108864",
    "entityType": "Track",
    "nonce": "0x2dc942967ead44e96f829978650b391a3cbc62b177a6d2dca499244afc2fbf0b",
    "signature": "0x8241150e4b42915c758c66f0d94e34a3beea4efa2f048748fa00075ed8665c2579629350ded4f61fb1eac0eea06719745f3b731b0559692fd048aa9b2eaf30dc1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}