{
  "manageEntity": {
    "action": "Save",
    "entityId": "379486513",
    "entityType": "Track",
    "nonce": "0x5daa0f787b33f88ebffb0a5ca12abac981248c09feddd6eaf0b99b16c37dfdec",
    "signature": "0x5cd966698cc6f9669081415b5b2a25f6a40f8f33104b9585b5684a4d6ed65b411cc4d1c7af78b7baa5d8b826776d6c9706d9c460f0fc0df0ef2125e33669045c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}