{
  "manageEntity": {
    "action": "Save",
    "entityId": "1113650519",
    "entityType": "Track",
    "nonce": "0x42561560180baa58d0dda08487e7e920527f4622a2091ee7a8e3141cdaef1466",
    "signature": "0x8f703b7424bb375c08de631745c67adeea2509af1126bbb370f32958c7089d8d493cee285c58b36797bc23e6ac99f51fc8e6f419df0dbaafdd68d26b9a217f361c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}