{
  "manageEntity": {
    "action": "Save",
    "entityId": "1669826788",
    "entityType": "Track",
    "nonce": "0x8d49dc1bb820ab113cd4ab94409abfef726f7d6e5da83e3a5c1825f6fdf66264",
    "signature": "0x9fb88369669602a0b3b5b4f0a01e103fd86167e6cda49e1507d28d7b0dc4422d7e4c06f8b904ab06c0d5f66025e2f590dbab5efe3b37722ee7567e92dbc24e221b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}