{
  "manageEntity": {
    "action": "Save",
    "entityId": "46378882",
    "entityType": "Track",
    "nonce": "0x76d1722ee510b687e1dca87e8159f85dd4a49eb142d4e6c866fa09558d4a223c",
    "signature": "0x4ee3804a50bbbfb9e53cd98b25482193337ca58288b09879f1c8b6bdcb9907d659f3a63fbeb79fd18d24d47946ff529bb92d373b2b8642c99092114d2078279f1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}