{
  "manageEntity": {
    "action": "Save",
    "entityId": "1955699650",
    "entityType": "Track",
    "nonce": "0xe4b7c99b38068efdb063f0c6a28c6da9149fad7887cc76c78b6ca8f7f000f3a2",
    "signature": "0xbd11635a4964bf0339b96f11fe0a5cdf6300d5340f5caf0ac55de285b62f916d6e017172c1625427cb601ce8eeffcf2a0b1ef6eb8ca4af8c991bc56411a666011c",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}