{
  "manageEntity": {
    "action": "Save",
    "entityId": "3848015",
    "entityType": "Track",
    "nonce": "0x048acc725058b70f300ac998648e8e7413b7fb3fedce7671358ea5332b550bf3",
    "signature": "0xf8fd94c50538aab0fe9e0a7d55c405679f42e5542ab480881b1c124d2884b8231f62212721b8b04747552ff7d397de8d8ea76c5fffb9134d50c5206bbcd038a71b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}