{
  "manageEntity": {
    "action": "Save",
    "entityId": "1112997469",
    "entityType": "Track",
    "nonce": "0x0f33b9893c8e9c69511321796dce8f71150467cd2f64e9bd731b785992cd5c30",
    "signature": "0x985a6edd05e0660a5645f0b698d05cd9e8557f1fcb5d577f727bfc2cad25a0f27356f49ea4ef1991dd6216736ca97828e89e9fe3a1a748c00b39d37f32d70a171c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}