{
  "manageEntity": {
    "action": "Save",
    "entityId": "187902135",
    "entityType": "Track",
    "nonce": "0x0d766cbe3be9f07d5191e011bd686467b268d029483154f490ca1758b88f5f55",
    "signature": "0x1025cf53ef171e3e980886ebb28228789df8e531ac974af60c53e1f8935137140a3e113eeb02892c5c628254bfad2abd6a77acfc1d175dd61c46d254414fb9851b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}