{
  "manageEntity": {
    "action": "Save",
    "entityId": "472060",
    "entityType": "Track",
    "nonce": "0xc7837e9251e92eac24284ddfb60cf87d93410a9565b8e402acba2d7cf7fa83a2",
    "signature": "0xf850e16117d06ed8ba05f4e47d19a5a2f16e9f097f36133cf37a77a6a7e4551e635db855de5e666c68b34e8e3517918e65c6ee284494433faf77345202c0a3151b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}