{
  "manageEntity": {
    "action": "Save",
    "entityId": "1287595839",
    "entityType": "Track",
    "nonce": "0x007c37ed8e903268f9b8abd2de372fcfda191b7a66b8cb358b40dd3f2ac6f12f",
    "signature": "0x8ff9a65f669e1a8da00b355cce7f057f9bcbc792e363fdd01f2c8ef87c1442330e899ced045ea2c4e7d82b5c62d7a9f099f75c9d0d4e26eafdde3ec64afe0c5a1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}