{
  "manageEntity": {
    "action": "Save",
    "entityId": "1311812574",
    "entityType": "Track",
    "nonce": "0xd5ed6c61e28e22c2f83c56bd4826f6a1696523c217cea27cd702763729389a38",
    "signature": "0xfc81a2bf5196d786cedbfb078c344abdb9e437e97635e06d3232b4695ffa09d811706a8e8a467730533991b8b21a4736f2417274dbf0d170f8b86795f91c19f91c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}