{
  "manageEntity": {
    "action": "Save",
    "entityId": "441250032",
    "entityType": "Track",
    "nonce": "0x309e8e71fefbfb7c1dc970611dc2dddcf3d0ef859a81b0df38d3a6a2add2b5c7",
    "signature": "0x240710a47cc7d3800a6632d81c7651bcc212410e6f04e1751301f48a872c39833eec5e3c84f668734a408f856eeb261da7c6f7b2ea6766295200d0f7399501941c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}