{
  "manageEntity": {
    "action": "Save",
    "entityId": "625263703",
    "entityType": "Track",
    "nonce": "0x0fe22d9693fd97b015f8bedda518922b948d7549ee0fcd7eb25c49f6b7a16814",
    "signature": "0x16430c671ac5d5a91fc4d441d0950ddb4b7cea39aec4ec3c67c58662806be33e315ee4caaed7cc60e8e17dfc71d226bee66dd7ed5005af503afc1067e78094201c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}