{
  "manageEntity": {
    "action": "Save",
    "entityId": "524064598",
    "entityType": "Track",
    "nonce": "0xe48169cac529ff96cdad4b1e1bed4d9a4d36e8ef984f814f948e724a1240440b",
    "signature": "0x83e0832e8d9da069d24a17725d5568a6c0882b706594d7ab049d4ea4cddb124e77e989a8b31db3e0f41244c9186e3ed0c6314398fb17f5b4303f3773b395bb7f1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}