{
  "manageEntity": {
    "action": "Save",
    "entityId": "133057712",
    "entityType": "Track",
    "nonce": "0x780da18c806e20a07ba993daf378b3ad670d76c63e3a5a39ddef626ae32076a0",
    "signature": "0x29aabcfcdfc0f2abb07946bf3adc9623d4ba3544323db23129510e26b3827b2b4fe4143891285ef7a272cdcf74374eb87602025d9638bd0f3b149879d7b29c401c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}