{
  "manageEntity": {
    "action": "Save",
    "entityId": "391105101",
    "entityType": "Track",
    "nonce": "0x095d52f727133833bb8d495552ab5e4dbec2811e02aa7ef493de26f0fd01d01d",
    "signature": "0x995755e8dba002d3d005e50efeda39e9baafe37ce7b84708ed4f944593b663e447fdbc4f9234c1d4118b0af12184ccb6454e984f7caa1b51e04171c02952319f1c",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}