{
  "manageEntity": {
    "action": "Save",
    "entityId": "1156833883",
    "entityType": "Track",
    "nonce": "0x951faadc2cd47259e1223820f2c6cf113cbf54a79dcd37c74cc1bb186df944ca",
    "signature": "0x4646fc26b5caeb971f4b9ad3aea3963707c5381b485e20c82e5a828db40249ed03510b5ab250b897888f7a013e2d7cd29665807003a14b9030a823b4b407870e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}