{
  "manageEntity": {
    "action": "Save",
    "entityId": "532985275",
    "entityType": "Track",
    "nonce": "0x4a08aeb7b89bccec1cc37f5d781efe283692ea01473d2741dff78344ea9e5c93",
    "signature": "0x3381dd17056976ab51bf99000cb40cdeafaff39660a076c106d386c549674bf049b5f8b569989cb5e31759f0922d4887ace16e775a1e04c1cc0e234de2ff3c311c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}