{
  "manageEntity": {
    "action": "Save",
    "entityId": "1301231839",
    "entityType": "Track",
    "nonce": "0x32bbcd13ec525761c7271dc4d7ce40aa2a6cf25eaa5549ba725c36137fec7ae9",
    "signature": "0x303b11e9f6016cf70c9e8450a35ef2ad8371372807310918ff2698b53d115b5515f67d36fdddb5435519603cfea2ae88cccc1e79220174a0c5a3cf386fd1cb921b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}