{
  "manageEntity": {
    "action": "Save",
    "entityId": "369476",
    "entityType": "Track",
    "nonce": "0x502e86f7728ea32030c78d825cd227488eed6695c5343cd5877b8aeba0faf2f5",
    "signature": "0x86124270587c931982c43d16b3150df999720f9cafc3bf4da5c4ec548f5512ac3e0997f469f0fc1304205078c320a6a2d3bba404fe596f2d6c13a09455dec6671b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}