{
  "manageEntity": {
    "action": "Save",
    "entityId": "1263247959",
    "entityType": "Track",
    "nonce": "0x0f9e066be0831e8f30294cd932effe536cd33e59536a29b5e85b981790232c2c",
    "signature": "0xaa6b0c56cfa3b77ee2f1a3bdd5b60a05d212124b4f309e1b3880aae443e8d7663e2697dd17a69653a6ce323fdc4529b97ed62e7a353d04bc22c2c347e02091881c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}