{
  "manageEntity": {
    "action": "Save",
    "entityId": "368472",
    "entityType": "Track",
    "nonce": "0x181cd692ee8de8e9818e1fbc4f3bbe0f1d43b7e66db2e05ac9109dbcbb678827",
    "signature": "0xd7ccaaceaaa79da893ecf4af59a45104ac06b0e24bcf9813517fa94493905a280d4f866aa2c5ccc31531d5e1dd275df2f71b7e6fc1caf5064ebf9c732d938af91b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}