{
  "manageEntity": {
    "action": "Save",
    "entityId": "1435194524",
    "entityType": "Track",
    "nonce": "0x8aa954364b589547c2b6bb0a590b43a9bd41ef81de10a3dda6b74e8a2e77c707",
    "signature": "0xcd143b74482476855048fc282b3559035c63bdfa6a9d7616a370b5e37dd47afb33034a7115355b80559b5638e3beb6ac5225eefe38a1ef439d9b6c4dd4e2c0711b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}