{
  "manageEntity": {
    "action": "Save",
    "entityId": "1950865395",
    "entityType": "Track",
    "nonce": "0xe464fdef5ab8bf04fd6198404f7163dd803de241f7967eb356b635ee0277e4da",
    "signature": "0xe7b8f32b7305565f5fb90f965d0ddd75a20212fc53f675ddf54f60de81f8d62941a5c3281803fe9adbf5a1904434789756f9a35fa6b36368ee4e6cdf105471201c",
    "signer": "0x371016A742e83D7d741A124f1dE99A095AA45CfD",
    "userId": "407477745"
  }
}