{
  "manageEntity": {
    "action": "Save",
    "entityId": "368254",
    "entityType": "Track",
    "nonce": "0x1af5419c2f37e1ff795a576d05b3cf2ab5c7ddaaa7b10e3b3d1974fd59b2ad05",
    "signature": "0x47a476c62ae8c48a94642b9af697ad47131544a39f39c69baeeece3e662b72d56deb861af0ac01d3340631f720c13eef119f2b8cc1cb294436a11871b19683441b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}