{
  "manageEntity": {
    "action": "Save",
    "entityId": "467570846",
    "entityType": "Track",
    "nonce": "0x694c9fef94696d457da84bd7df2868fd89073108ac72dc1dce10929debf5edef",
    "signature": "0x92a833d7d67675b9e42f75d55b4ee1a2577929ef738db56bcc97a8508540a7637674513de8818b4368d1a11840211df94297e0ff7ff1fe140093863337ea72da1b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}