{
  "manageEntity": {
    "action": "Save",
    "entityId": "1396001117",
    "entityType": "Track",
    "nonce": "0x4a2741a642700aa408ec45e4e9d5ad9a7cfda22dd028011a23a4eaebf174692b",
    "signature": "0x1e01e1527658a7f13a20e2942e958adf78256995009d0e562c9f8460a3ee3d26637a59686d65b61d9385a2395c752b64c80b078f1810e6f81961c1bbe8bd063d1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}