{
  "manageEntity": {
    "action": "Save",
    "entityId": "1873118072",
    "entityType": "Track",
    "nonce": "0x118b733565c5aa966fbf8a5e3fc78b9ae35f5f50d5bbe54f167e0b9e62160ebf",
    "signature": "0x9e2cd3f7372e642a020271c4e96b1f23a47d51962f6c57964eac1f19dae1ca54433b9a43dc16561d3982d109ee25bec942ab02608c765aa9aa5f57d5e94954ae1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}